Spark-arrester



(No Model.) 2 SheQts-Sheet 1.

G. D. HUNTER. QSPARK A RRBSTER.

NO. 312,722. Patented Peb. 24, 1885.

WITNESSES mvttorneyg i (No Model'.) v I 2 Sheets-Sheet; 2.

G. D. HUNTER. Y

SPARK ARRESTER. No. 312,722. l lPatented Peb. 24, 1885.

WI TJV ESSES 'UNTTEE STATES TATENT Erica;

GEORGE D. HUNTER, OF TERRE HAUTE, ASSIGNOE OF TVO-THIRDS TO THOMAS O. VAN NUYS AND MORTON O. HUNTER, BOTH OF BLOOM- INGTON, INDIANA.

SPARK-ARRESTER.

PBCIFICATION forming part of Letters Patent No. 312,722, dated February 24, 1885.

`Applicationlcd October 6, 139,4. (Xo model.)

tives; and this my present invention is constructed to be used in connection with that on which Letters Patent of the United States :is-

- sued to me October 2, 1883, numbered 285,899,

- ranged with relation to the slotted portion of the drum that a partial vacuum is formed in the forward end of the smoke-box by the violent upward escape of the exhauststeam, the vacuum having the effect of inducing the more solid products of combustion to pass around the drum to that portion of the smoke-box.

' My present invention has for its objects, first, to provide means for inducing the smoke, the gases, and the more solid particles of combustion, cinders, sparks, dto., escaping from the boiler-dues to take a more downward course in the smoke-box, whereby the more solid products are directly projected into the vacuum formed, as above mentioned, in the lower forward part of the smoke-box, and yet allowing of the unobstructed and even draft of the flues and permitting of the nal escape of the smoke and gases to and out of the stack, and, second, to so construct such means as to readily allow of access to the boiler-fines without removing the said means.

"With these ends in view my invention consists, essentially, of a detlector secured tothe boiler-head and disposed within the smoke-I box in a forward and downward `extended position, having a space between the imperforated portion of the drum and its interior edge, so as not to necessitate the descent of all the smoke and gases, as more minutely hereinafter appearing. V

In the accompanying drawings, forming a part of this specification, and on which like letters of reference indicate the same or correspondingfeatures, Figure l represents avertical longitudinal sectional view taken through a smoke-box, showing a part of a locomotive and my improved spark-arrester and deector applied; Fig. 2, an elevation of the front of a locomotive, looking into the s1noke-boX,withi'n 4 which is applied the detlector, and Fig. 3, a detached plan View of the deiiector.

The letter A designates the smokebox of a locomotive, the same being of the ordinary or any approved construction, and within which is placed my improved spark-arrester, consisting, essentially, of a conical drum, A', having the rearportion 'imperforated and the for-` ward portion provided with a series of slots, and mounted and constructed in accordance with the patent above mentioned. This drum is provided with a crown-sheet, B, to which is attached a screen,O,the reticulations of which consist,preferably,of obliquely-disposed slots, all as more fully set forth in ent already alluded to.

The letter B/ refers to the boiler-dues, the

' forward ends thereof being secured, as usual,

to the boiler-head C. To this boiler-head is attached the deector D, in any convenient manner, in the present instance by means of the angle-iron plate E, bolted or riveted to the head and to the deflector. This deflector is constructed of metal, and extends, preferably in the arc of a circle, in a forward and downward direction, embracing in a vertical line from three to ve (or more) of the flues. At either side or edge the deflector is so sized and coniigurated as to fit or substantially t the inner adjacent walls of the smokebox, as seen in Fig. 2. Thedeiiectoris cut away,or formed so as to constitute the arc of a circle at its lower edge, forming a sort of interior line, which, when the detlector is in position embraces or partly embraces the rear mperforated portion of the conical drum, a space or clearance of from three to five inches (more or less) between such edge and thatpart ofthe drum. This space, however, may be allowed the Letters Pat- IOO to exist only at the rear portion ot' the iinperforated part, t-he remainder of the interior edge ofthe deflector being in this instance in.

contact, or Virtually so, with (he drum. The body of this detlector serves the function of directing the smoke, gases, and the more solid particles of combustion escaping from the 1irebox through the i'lues into the smokebox downwardly and toward the lower or bottom part of the smoke-box, whereby the more solid particles or products are more eii'ectually brought forward and under the influence of the side discharge issuing from the branch F of the exhaust-nozzle, as fully explained in the Letters Patent before herein referred to. The space vbefore alluded to serves to allow the smoke and gases, or some portions thereof at least, to play round the drum, whence they are more readily taken up through the perforations in the same and conducted to and out the stack by the action of the draft. This space also serves the important purpose of allowing access to the iiues without removing the deflector,should occasion require, the drum being tirst swung out the smoke-box, as provided in the patent to which reference has several times been made. A space may, if desired, be left between the outer edges ofthe deiiector and the inner wall of the smoke-box, to aid in the more direct escape ofthe smoke and gases.

By means of this invention it is found that the accumulations of sparks, cinders, &c., about the exhaustnozzle and the joints of the steam-pipes within thesrnoke-box are effectually avoided.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In aspark-arrestcr, the combination, with a smokebox, a drum therein, and an exhaust nozzle having a side discharge, of a deflector arranged with such relation to the drum as to direct the products of combustion downwardly in the smolrebox.

2. In aspark-arrester, the combination,with the smoke-box and a drum therein having a perforated and an imperforatedportion, of a detlector arranged in a downward and forward position, and with such relation to the drum as to direct the products of combustion downwardly in the smoke-box. v

3. In aspark-arrester, the combination, with the smoke-box and drum having a rear imperforated portion, of a detiector secured to the boiler-head, extended in a downward and forward direction,and having a space between its inncr edge and the drum, and arranged to` downwardly direct the products of combustion in the smoke-box.

4. In asparlearrester, the cou1bination,with the smoke-box and 'the drum therein, of the deector extending in a downward and forward direction, having a space between it and the rear portion of the drum, the remainder of the inner edge being in contact with the drum.

5. lnaspark-arrester, the combinatioinwith the smokebox and the drum having an imperforated and aperforated portion, of the dei'lector secured to the boiler-head, extended in a downward and forward direction, having a space between it and the rear portion of the drum.

In testimony whereofI afiix my signature in presence of two witnesses.

GEO. D. HUNTER.

Vitnesses:

L. B. BRAY, C. T. RoBnRTsoN. 

